Results 41 to 50 of about 957,129 (290)

Research and analysis on low-velocity impact of composite materials

Science and Engineering of Composite Materials, 2023
In this article, the concept of low-velocity impact resistance in composite materials is presented. Three existing expressions (e.g., bilinear, parabola, and exponential) that show the relationship between the dent depth and impact energy of composite ...
Qiu Ju
doaj   +1 more source

The influence of toughening-particles in CFRPs on low velocity impact damage resistance performance

, 2014
The role of particle-toughening for increasing impact damage resistance in carbon fibre reinforced polymer (CFRP) composites was investigated. Five carbon fibre reinforced systems consisting of four particle-toughened matrices and one system containing ...
Bull, D.J., Scott, A.E., Sinclair, I., Spearing, S.M.   +3 more
core   +1 more source

Impacts on foam stabilised composite structures: experimental and numerical study [PDF]

, 2003
A dropweight tester is used to make low velocity tests on specific sandwich type structures. Sandwich are made of glass-epoxy skin and polyurethane foam core.
Barrau, Jean-Jacques, Ferrero, Jean-François, Rivallant, Samuel   +2 more
core   +1 more source

By dawn or dusk—how circadian timing rewrites bacterial infection outcomes

FEBS Letters, EarlyView.
The circadian clock shapes immune function, yet its influence on infection outcomes is only beginning to be understood. This review highlights how circadian timing alters host responses to the bacterial pathogens Salmonella enterica, Listeria monocytogenes, and Streptococcus pneumoniae revealing that the effectiveness of immune defense depends not only
Devons Mo, Catherine S. Palmer, Jacqueline M. Kimmey   +2 more
wiley   +1 more source

Low velocity impact responses of symmetric and asymmetric curved foam core sandwich panels

European Mechanical Science
This work aims to experimentally examine the effects of various fibre reinforcements and curvature on the low-speed impact load responses of curved sandwich composites.
Fatih Balıkoğlu, Tayfur Kerem Demircioğlu, Berkan Hızarcı, Mehmet Özer   +3 more
doaj   +1 more source

A Handheld low-mass, impact instrument to measure nondestructive firmness of fruit [PDF]

, 2009
A portable, handheld impact firmness sensor was designed for nondestructive measurement of fruit firmness while the fruit remain attached to the tree or for use in other remote locations where the use of a benchtop instrument would be impractical.
Anderson, M., Chen, P., Ruiz-Altisent, Margarita, Sarig, Y., Slaughter, David, Thompson, J.F.   +5 more
core   +2 more sources

Structural insights into lacto‐N‐biose I recognition by a family 32 carbohydrate‐binding module from Bifidobacterium bifidum

FEBS Letters, EarlyView.
Bifidobacterium bifidum establishes symbiosis with infants by metabolizing lacto‐N‐biose I (LNB) from human milk oligosaccharides (HMOs). The extracellular multidomain enzyme LnbB drives this process, releasing LNB via its catalytic glycoside hydrolase family 20 (GH20) lacto‐N‐biosidase domain.
Xinzhe Zhang, Naoki Sunagawa, Toma Kashima, Kiyohiko Igarashi, Akimasa Miyanaga, Shinya Fushinobu   +5 more
wiley   +1 more source

Self-healing epoxy composites: preparation, characterization and healing performance

Journal of Materials Research and Technology, 2015
Low velocity impact damage is common in fiber reinforced composites, which leads to micro-crack and interfacial debonding, where damage is microscopic and invisible.
Reaz A. Chowdhury, Mahesh V. Hosur, Md. Nuruddin, Alfred Tcherbi-Narteh, Ashok Kumar, Veera Boddu, Shaik Jeelani   +6 more
doaj   +1 more source

Low velocity flexural impact behaviors of bamboo fiber reinforced composite beams

Polymer Testing, 2021
To investigate the anti-impact behavior and loading rate sensitivity of bamboo fiber reinforced composite (BFRC) beams, low-velocity-impact flexural experiments were performed under impact velocity changing from 2 m/s to 10 m/s.
Zhenyu Qiu, Jingxuan Wang, Hualin Fan
doaj   +1 more source

Real‐time assay of ribonucleotide reductase activity with a fluorescent RNA aptamer

FEBS Letters, EarlyView.
Ribonucleotide reductases (RNR) synthesize DNA building blocks de novo, making them crucial in DNA replication and drug targeting. FLARE introduces the first single‐tube real‐time coupled RNR assay, which enables isothermal tracking of RNR activity at nanomolar enzyme levels and allows the reconstruction of allosteric regulatory patterns and rapid ...
Jacopo De Capitani, Noemi E. Nwosu, Viktoria Gocke, Müge Kasanmascheff, Hannes Mutschler   +4 more
wiley   +1 more source